/* 首页头图加载 */
.pl-container {
    width: 100%;
    height: 100%;
    position: relative;
    overflow: hidden;
    will-change: transform; /* 添加性能优化 */
    animation: blur-to-clear 2s cubic-bezier(.62,.21,.25,1) 0s 1 normal backwards running, scale 1.5s cubic-bezier(.62,.21,.25,1) 0s 1 both;
  }
  .pl-img {
    width: 100%;
    height: 100%;
    position: absolute;
    background-position: center;
    background-size: cover;
    background-repeat: no-repeat;
    opacity: 0;
    transition: opacity 1s;
  }
  
  @keyframes blur-to-clear {
    0% {
      filter: blur(50px);
      opacity: 1;
    }
    100% {
      filter: blur(0);
      opacity: 1;
    }
  }
  
  @keyframes scale {
    0% {
      transform: scale(1.5) translateZ(0);
      opacity: 0;
    }
    to {
      transform: scale(1) translateZ(0);
      opacity: 1;
    }
  }
  
  .pl-visible {
    opacity: 1;
  }
  
  .pl-blur {
    /* 小图锯齿多，增加高斯模糊 */
    filter: blur(50px);
  }             